How loud is it really?

The maker rates it at 35 dB, about library level. Rotary tumblers get louder as barrels fill and the load shifts, so expect more noise with full barrels of large stones.

Can I run two different grit stages at once?

Yes. The two barrels are independent, so one can hold coarse grit while the other runs a finer stage or a different rock type.

Does it keep running after a power cut?

The power-off memory function restores the previous setting when power returns, so a long cycle does not restart from zero.

What comes in the box?

The tumbler with its two barrels and the control unit. Grit and polishing media are not clearly listed, so plan to buy a grit kit separately.

Is it good for beginners?

The control panel is simple and the timer handles long runs, so it works for beginners. Budget for grit and expect to learn how to seat the lid seals.

How does it compare with a single-barrel tumbler?

It processes more rock per cycle and lets you split stages, but it is heavier and takes more space than a small single-barrel unit.

Where is the KFFKFF 8 lbs Double Barrel Rock Tumbler cheapest?

At Walmart, for $102.60, as of our latest check.

KFFKFF 8 lbs Double Barrel Rock Tumbler

Best price now

$102.60at WalmartChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Walmart

KFFKFF 8 lbs Double Barrel Rock Tumbler

Best price now

$102.60at WalmartChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $102.60 at Walmart on Nov 8.

Our take on the KFFKFF 8 lbs Double Barrel Rock Tumbler

The KFFKFF 8 lbs Double Barrel Rock Tumbler is a dual-barrel rotary tumbler with a direct-drive motor, four speed settings and a timer that runs from 1 to 9 days. It adds overload protection and a power-off memory function that resumes the cycle after an outage. The maker rates noise at 35 dB, quiet enough for a garage or spare room. It suits hobbyists who want two batches going at once and long unattended runs; compared with single-barrel 3 lb tumblers it holds more rock per cycle, but it is a basic rotary unit without the reversing motor or grit kits some rivals bundle.

Best forHobbyists polishing two batches at onceLong unattended rough-grind cyclesQuiet home or apartment useBeginners who want simple controls

Pros

Two 8 lb barrels allow separate grit stages or rock types
Timer spans 1 to 9 days for long rough-grind runs
Four speed settings for different stages
Power-off memory resumes the cycle after an outage
Overload protection guards the motor
Rated at 35 dB, quiet for a rotary tumbler

Cons

Direct-drive motor is louder under heavy loads than belt-driven rivals in practice
No reversing mode, which some tumblers use to avoid flat spots
Grit and polishing media are not clearly included
Barrel and lid seals need careful seating to avoid leaks
Heavy when both barrels are loaded

KFFKFF 8 lbs Double Barrel Rock Tumbler prices at every store

WalmartNew
In stockSold by Home Decor Shop USReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$102.60Free shippingChecked Nov 8
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About the KFFKFF 8 lbs Double Barrel Rock Tumbler

This is a double barrel rock tumbler with an 8-pound barrel capacity. It uses a direct-drive motor and polishes rough stones step by step into smooth, polished pieces. The sealed barrel construction minimizes the risk of leaks.

A control panel lets you set the runtime and choose from four speed settings. The timer adjusts from 1 to 9 days. The motor runs at a noise level of 35 dB or less.

Safety features include overload protection and a power-off memory function that lets it resume after an interruption. It also has a low-voltage design that reduces the risk of electrical shock.

Model: KD-C8021
Color: Black
Capacity: 8 lbs barrel
Motor: Direct-drive
Speeds: 4 settings (1–4)
Timer: Adjustable from 1 to 9 days
Noise level: 35 dB or less
Safety: Overload protection, power-off memory, low-voltage design, sealed construction
Dimensions: 12.2 x 9.06 x 8.66 in (310 x 230 x 220 mm)
Without barrel: 12.2 x 9.06 x 4.33 in (310 x 230 x 110 mm)
Weight: 13.45 lbs (6.10 kg)
In the box: 1 x rock tumbler kit, 1 x user manual, 1 x adapter

Specifications

color: BlackSource

Questions and answers

How loud is it really?: The maker rates it at 35 dB, about library level. Rotary tumblers get louder as barrels fill and the load shifts, so expect more noise with full barrels of large stones.
Can I run two different grit stages at once?: Yes. The two barrels are independent, so one can hold coarse grit while the other runs a finer stage or a different rock type.
Does it keep running after a power cut?: The power-off memory function restores the previous setting when power returns, so a long cycle does not restart from zero.
What comes in the box?: The tumbler with its two barrels and the control unit. Grit and polishing media are not clearly listed, so plan to buy a grit kit separately.
Is it good for beginners?: The control panel is simple and the timer handles long runs, so it works for beginners. Budget for grit and expect to learn how to seat the lid seals.
How does it compare with a single-barrel tumbler?: It processes more rock per cycle and lets you split stages, but it is heavier and takes more space than a small single-barrel unit.
Where is the KFFKFF 8 lbs Double Barrel Rock Tumbler cheapest?: At Walmart, for $102.60, as of our latest check.